Living Organisms / Animalia / Craniata / Mammalia / Chiroptera / Vespertilionidae / Myotis / Species
Myotis nattereri - Natterer's bat (Click photographs/illustrations: full picture & further details)
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INFORMATION AVAILABLE

GENERAL & REFERENCES

APPEARANCE / MORPHOLOGY

LIFE STAGES / NATURAL DIET / PHYSIOLOGY

BEHAVIOUR

HABITAT & RANGE

CONSERVATION

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General and References

Alternative Names (Synonyms)

  • Vespertilio nattereri Kuhl, 1818; Germany
  • Selysius nattereri

Alternative species names (the second part of the binomial species names): [Genus] escalerae; [Genus] spelaeus; [Genus] tschuliansis; [Genus] typus; (B141).

Names for new-borns / juveniles

 
Names for males  
Names for females  

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General Appearance

Medium-size bat, fur light brown upper, pale underside, with broad, pointed wings, brown wing membranes and long fairly narrow ears shading from pink base to light brown tip (B142)

Similar Species

Distinguished from non-Myotis bat species in Britain and Ireland by combination of:
  • Simple form of nose
  • Wide-spaced ears
  • Lack of post-calcarial lobe to membrane.

Distinguished from other Myotis spp.:

  • Forearm less than 50mm long.
  • Ears less than 18mm long (14-17mm)
  • Row of stiff bristles about 1mm long on edge of tail membrane from end of calcar to tail (may be long fine hairs on calcar). Tragus two thirds of ear length, thin, pointed and with straight sides.

(B167).

Distinguished from Myotis mystacinus - Whiskered bat and Myotis brandtii - Brandt's bat by: larger size, paler face, paler membranes, long slender tragus (B142).

Also distinguished from other Myotis spp. by conspicous bristles on trailing edge of tail (interfemoral) membrane (B142).

Sexual Dimorphism Males slightly smaller than females: e.g. average forearm length males 39.0mm versus females 39.7mm in Suffolk (B142)

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References

Species Author

Debra Bourne

Major References

B51, B141, B142, B143, B147, B167, B221

Husbandry references:

ORGANISATIONS
(UK Contacts)

ELECTRONIC LIBRARY
(Further Reading)
Click image for full contents list of ELECTRONIC LIBRARY

  • --

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TAXA Group (where information has been collated for an entire group on a modular basis)

Parent Group

  • Insectivorous Bats (Microchiroptera)

Specific Needs Group referenced in Management Techniques

  • Insectivorous Bats (Microchiroptera)

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Husbandry Information

Notes

--
Individual Techniques linked in Wildpro

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Appearance / Morphology

Measurement & Weight

Length
  • Head-body length: 40-50mm (B142)
  • Forearm length: 36-43mm (B142)
  • Wingspan: 250-300mm (B142)
Height --
Adult weight General --
Male --
Female --
New-born weight --
Growth rate --

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Head

General Skull: condylobasilar length 14-15mm (B142)

Nose: Muzzle narrow, unspecialised (B142)

Ears: well spaced. Held upright. Fairly long (14-18 mm), narrow, with tip slightly reflexed.Emargination on outer margin. No post-calcarial lobe. Tragus two thirds of ear length, long, thin, pointed with straight sides. Pink at base shading to light brown at tip. (B142)

Dentition (Teeth) I 2/3, C1/1, P3/3, M3/3 (B142)
Eyes --

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Legs and Tracks

  • Forearm length: 36-43mm (B142)
  • Wingspan: 250-300mm (B142)

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Tail

--

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Coat / Pelage

Adult Female
  • Dorsal: light brown, sharply demarkated from ear to shoulder from
  • Ventral white/very pale buff.
  • Wing membranes: mid-brown.
  • Ears: base pink, shading to tip light brown.

(B142)

Variations (If present) --
Moult --
New-born / Juvenile --

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Neonate (New-born) Characteristics

--

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Detailed Anatomy Notes
(Summary information provided for pertinent species-specific data cross-referenced in Wildpro)

--

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Life Stages / Natural Diet / Physiology

Reproductive Stages

Breeding Season
  • Copulation observed in December (B142).
Oestrus / Ovulation --
Gestation / Pregnancy --
Parturition / Birth
  • End June/early July (B142)
Neonatal development --
Litter size
Time between Litters / Litters per year
  • One per year (B142).
Lactation / Milk Production --
Sexual Maturity --
Longevity
  • Greatest recorded age over 17 years old (Netherlands); in Britain oldest over 12 years (B142).

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Natural Diet

Small insects:
  • Mainly Diptera (flies)
  • Also Coleoptera (beetles), Opiliones (harvestmen), Aranaea (spiders), Lepidoptera larvae (caterpillars), caddis flies.
  • Opportunistic on arthropods 1-15mm at 57N and higher latitudes (B143)

(B142).

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Detailed Physiology Notes
(Summary information provided for pertinent species-specific data cross-referenced in Wildpro)

Temperature --
Pulse --
Respiration --
Faeces --
Haematology / Biochemistry --
Chromosomes 2n=44, FNa =50-52 (B142).
Other --

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Behaviour

Feeding Behaviour

  • Forage in woodland edges, parkland, roadside vegetation, over sheltered water.
  • Mainly catch and eat prey in flight.
  • Also take prey from foliage.

(B142, B143).

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Parental Behaviour

--

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Social Behaviour / Territoriality

Intra-specific
  • Summer: form nursery colonies of up to 100 adult females (B142).
Inter-specific --

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Sexual Behaviour

  • Promiscuous (B142).

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Predation in Wild

--

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Activity Patterns

  • Flight slow to medium, up to 16m above land, usually around trees and in tree canopy; also over water.
  • Winter: arrival at hibernation caves starts December.
  • Most leave hibernation caves by early March (Wiltshire and Suffolk data).
  • Hibernation temperatures: Autumn at 8-14C, winter at 6-10C (Poland data).

(B142).

Circadian
  • Emergence 45-60 minutes after sunset (Fife data).
  • Return about 1-2 hours before sunrise.
  • Females may return to roost after only an hour when have young.

(B142)

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Habitat and Range

General Habitat Type

  • Woodland, including open woodland, parks.
  • In Scotland: wooded areas of both river valleys and loch sides; also conifer plantations.
  • Sea level to 2000m (B143)
  • Forage in woodland edges, parkland, roadside vegetation, over sheltered water.

(B142, B143)

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Nests / Burrows / Shelters

Roosts:
  • Summer: Hollow trees, caves, old buildings (including houses, castles, barns), bat boxes, sometimes cracks under bridges
  • Hibernacula: caves, cellars, mines; in Scotland all quarry tunnels.
  • Cool entrance areas of caves prefered.

(B142, B143).

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Distribution and Movement (Migration etc.)

Normal Europe, Morocco, Algeria, Caucasus, Turkey, Kurdistan (northern Iraq), Israel, Jordan, Iran, Turkmenistan (B147).

Portugal and Ireland eastwards to Urals, Near East and Turkmenia; also in north-western Africa (B143).

Western Euope to Urals and Israel, also north Africa (B51).

  • Europe: From Britain and Ireland eastwards. Northern limit 63N in Sweden (B142, B143)
  • In Britain: throughout England and Wales, including large islands such as Isle of Wight, Isle of Man, Angelsea; also much of Scotland except far west. Also Ireland.(B142)

Movements:

  • Sedentary.
  • Longest recorded movements 90km; longest in Britain 24km, in Netherlands 62km.\
  • (B142, B143).
Occasional and Accidental --
Introduced

--.

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Conservation

Intraspecific variation

Two subspecies:
  • Myotis nattereri nattereri (Europe to Urals, Near East, Morocco, Algeria).
  • Myotis nattereri tschuliensis Kuzyakin, 1935 (Transcaucasia, Iraq, Turkmenistan).

General increase in size west to east across the western Palearctic .

(B143).

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Conservation Status

Wild Population -
(Importance)

Widespread but rare over much of Europe particularly in south.

  • Bern Convention, Appendix II
  • Bonn Convention, Appendix II.
  • EU Habitats and Species Directive, Annex IV

(B143)

  • In Britain: native, through much of Britain fairly common. Pre-breeding population estimate of about 100,000, including 70,000 in England, 17,500 in Scotland, 12,500 in Wales. Population estimate was "based on a very limited amount of information for the species" although additional knowledge "may not necessarily have made a substantial difference to the estimate". (B221)

General Legislation

European legislation not listed here - check:

  • Bern Convention, Appendix II
  • Bonn Convention, Appendix II.
  • EU Habitats and Species Directive, Annex II & Annex IV
CITES listing --
Red-data book listing --
Threats Loss of roosts, particularly chemical treatment of timber (B143).
Captive Populations  
Trade  

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